Upon completing the objective for each skull a flash will appear on the minimap showing you where the skull is located.
Objective: Kill 100 grunts.
Effect: When grunts die their methane tank always shoots off
Grunt Birthday Party
Objective: Kill 20 Jackals
Effect: Grunts explode into confetti.
Objective: Kill 45 Hunters
Effect: Destruction physics are magnified.
Objective: Kill 50 Elites
Effect: Scarabs shoot rainbows made of pure love.
Objective: Kill 5 Wraiths
Effect: No minimap, final score will increase.
Objective: Kill 50 Banshees
Effect: All Player units have 50% fewer hitpoints, final score will increase.
Objective: Kill 10 Locusts
Effect: Non-Player units get 25% more hitpoints, final score will increase.
Objective: Kill 750 Infection Forms
Effect: Mon-Player units do 50% more damage, final score will increase.
Objective: Kill 20 Flood Stalks
Effect: Non-Player units star with extra veterancy, final score will increase.
Objective: Kill 350 Swarms
Effect: All Player unit abilities recharge in half the time, final score will decrease.
Objective: Kill 100 Sentinels
Effect: All Player units have 50% more hitpoints, final score will increase.
Objective: Kill 12 Spirit Transports
Effect: All non-Player units have a 5% change to blow up upon death, final score will decrease.
Objective: Kill 10 Bomber Forms
Effect: All Player units train 50% faster, final score will decrease.
Objective: Kill 20 Vampires
Effect: Supplies come in 25% faster, final score will decrease.
Objective:Kill 3 Scarabs
Effect: All Player abilities will recharge in half the time, final score will decrease.